| Post Name | LECTURER IN COMPUTER ENGINEERING - TECHNICAL EDUCATION(Polytechnics) |
|---|---|
| Question Paper Code | 132/2023 |
| Category Code | 064/2021 |
| Date of Test | 27 July 2023 |
| Medium of Question | ENGLISH |
| Exam Type | OMR Examination |
| Total Questions | 100 |
1
Which of the following is not true?
Answer
Question Cancelled
2
The system of equations x β 2 y + 3z = 17 , 2x + y + 2z = 6 , 2x β 4 y + 6z = 34 has :
Answer
C. Infinite number of solutions
3
f(x) = 5xΒ³ + 2xΒ² β 3x. Consider: (i) f(x) has a local maximum at x = 3/5; (ii) a local minimum at x = β1/3; (iii) a local maximum at x = β3/5; (iv) a local minimum at x = 1/3. Then:
Answer
D. (iii) and (iv) are true
4
Equation of tangent to a curve at (2, 3) is 2x + 3y = 13. The equation of normal at (2, 3) is:
Answer
A. 3x β 2y = 0
5
lim 280 β*) Fess _
x0 x
1
Answer
Question Cancelled
6
Sum of coefficient in the expansion of (1 β 3x + 2x 3 )512 is :
Answer
A. 0
7
2i sec ΞΈ + tan ΞΈ = β2, where iΒ² = β1. What is the value of sec ΞΈ + 2i tan ΞΈ?
Answer
B. +β7
8
The value of [xa +x)" dx is:
0
-1 11
Answer
Question Cancelled
9
Area bounded by the curve y = sin x between x = 0 and x = 2Ο and the x-axis is:
Answer
D. 4 sq. units
10
Angle between the straight lines 2x β y + 3 = 0 and x + 2 y + 3 = 0 is :
Answer
A. 90Β°
11
A projected stone which is provided to serve as a support for trusses and beams is known as :
Answer
D. Corbel
12
The angle of intersection of two plane mirrors of an optical square is :
Answer
A. 45ο―
13
The Bulking of sand caused due to :
Answer
B. Surface moisture
14
The sensitivity of bubble tube can be increased :
Answer
B. increasing the diameter of tube
15
The axis about which the lower and upper plates of a theodolite rotate is called :
Answer
C. Vertical axis
16
Gudgeon pin connects :
Answer
B. Piston and connecting rod
17
For multi cylinder engines :
Answer
A. Lighter fly wheels are used
18
Which of the following act as a sort of regulating reservoir temporarily in the event of
rejection of load by the turbine in hydro electric power plant?
Answer
D. Forebay
19
Select correct statements about economiser used in steam power plants :
(i) It reduces the losses of heat with the flue gases
(ii) It is intended for heating the feed water
(iii) It increases the consumption of fuel
Answer
B. (i) and (ii) are correct
20
Moderators used in nuclear power plant :
Answer
C. Reduces neutrons speed
21
A conductor of length 28 meter has a resistance of 0.84 Ξ© . If the area of cross section of the
conductor is 2 meter square then its specific resistance is βββββ Ξ© β m :
Answer
Question Cancelled
22
The board of trade unit
Answer
A. kWh
23
Which of the following statement is / are correct about a Parallel Circuit?
(i) Different branch resistors have their individual currents.
(ii) The branch currents and conductance are additive.
(iii) Same voltage and current acts across all branches of the circuit.
Answer
B. Only (i) and (ii)
24
If a capacitor is connected across a 100 V dc supply for 0.2 sec with a steady current of 0.3 A,
then its capacity is βββββ Micro farad and charge is βββββ Coulomb.
Answer
D. 600 and 0.06
25
The ratio of effective value to mean value of an alternating wave is called :
Answer
A. Form factor
26
Voltage across the non-conducting diode in a bridge rectifier is βββββ, where 6V is the
peak value of the input voltage.
Answer
B. 6V
27
Function of relay is to :
Answer
C. Sense the fault and actuate the trip signal to CB
28
Statement which is not applicable to microcontroller :
Answer
A. It is a general purpose digital computer
29
Pick the statement which does not satisfy for GSM :
Answer
B. Operates on spread spectrum technique
30
UPS requires :
Answer
C. Both inverter and rectifier
31
The following are pairs of ISO-OSI layers/sub-layers and functionalities in which one of them
is incorrect. Identify the incorrect pair :
Answer
B. Data Link Layer, Bit synchronization
32
A sender, which employs Stop and Wait ARQ technique, wants to send 10 packets to a
receiver. Assume that the channel is noisy and every 4th packet sent by the sender is lost.
How many packets the sender will have to send in total so that the receiver receives all the
10 packets correctly?
Answer
C. 13
33
Consider the message M = 1010001101. The cyclic redundancy check (CRC) code for this message using divisor (generator) polynomial xβ΅ + xβ΄ + xΒ² + 1 is:
Answer
C. 01110
34
A sender A, which employs Sliding Window protocol, wants to send 64 byte packets to a
receiver B. Assume that the Round Trip Time is 80 milliseconds, and the maximum
bandwidth of the channel connecting A and B is 64 kbps. What is the optimal window size
that A should use?
Answer
A. 10
35
A sender A sends an IPv4 packet D to a receiver B. Assume that D reached B without any
error. Which of the following header fields of D would have changed during transit?
(i) TTL
(ii) Checksum
Answer
C. Both (i) and (ii)
36
Two computers A and B have IPv4 addresses 10.14.2.115 and 10.14.2.90 respectively. Which
of the following should not be used as a subnet mask for both, if both A and B should belong
to the same subnet?
Answer
D. 255.255.255.224
37
Identify the correct sequence in which the following packets are transmitted on the network
by a host when a browser requests a webpage from a remote server, assuming that the host
has just been restarted :
Answer
B. DNS query, TCP SYN, HTTP GET
38
Consider the following two statements :
S1 : Destination MAC address of an ARP reply message is a broadcast address.
S2 : Destination MAC address of an ARP request message is a broadcast address.
Which one of the following is correct?
Answer
B. S1 is false and S2 is true
39
Consider the two well-known hard problems :
βFactorization Problemβ (FP) and βDiscrete Logarithm Problemβ
Answer
C. Lost when either FP or DLP has a polynomial time solution
40
Alice digitally signs a message (say, using RSA digital signature scheme) and sends it to Bob.
Verification of the signature by Bob requires :
Answer
A. Aliceβs public key
41
Consider the following two statements :
S1 : A MAC provides both integrity and
Answer
D. ata origin) authentication.
S2 : A digital signature provides both integrity and
42
The value of 5 β1 mod 23 is :
Answer
D. None of these
43
Consider the following two statements :
S1 : FDMA has less issues due to signal interference than CDMA.
S2 : FDMA can accommodate more users per unit bandwidth than CDMA.
Which one of the following is correct?
Answer
C. S1 is true and S2 is false
44
The types of logical channels supported by the protocol L2CAP of Bluetooth are :
Answer
D. Signalling, Connection-less and Connection oriented logical channels
45
In a JβK flip-flop, when J = 1 and K = 1, the output toggles continuously between 1 and 0.
This oscillation between 1 and 0 leads to
Answer
B. Race-around Condition
46
The Boolean expression (X+Y)(X+Z) can be simplified as :
Answer
A. X+YZ
47
Which of the following values is to be considered for a βDonβt Care condition"?
Answer
C. Either 1 or 0
48
The hexadecimal equivalent of the octal number 675 is :
Answer
A. 1BD
49
The minimum number of D flip-flops needed to construct a modulo-258 counter is :
Answer
B. 9
50
Which of the following is the corresponding minterm when A = 1, B = 0, C = 0 and D = 1?
Answer
D. AΒ·Bβ²Β·Cβ²Β·D
51
A combinational circuit which has a single input, βnβ selection lines and a maximum of 2
outputs is a/an :
Answer
D. Demultiplexer
52
A 16-bit address bus can handle a maximum of βββββ different addresses.
Answer
B. 65536
53
A controller that takes control of the buses and transfers data directly between source and
destination bypassing the microprocessor is called :
Answer
A. DMA Controller
54
The memory address of the next instruction executed by the microprocessor 8086, when
operated in real mode with value in CS = 1000 and value in IP = E000, is :
Answer
B. 1E000
55
In 8086 assembly language, which of the following is not in the category of reserved words?
Answer
C. label
56
Identify the addressing mode which is used in the following instruction :
MOV AX, [1562H]
Answer
C. Direct addressing mode
57
In 8255 PPI, which of the following modes takes only port C bits for set or reset?
Answer
A. BSR Mode
58
For the 8279 programmable keyboard/display controller, in the βββββ mode, the key
matrix can be interfaced using either encoded or decoded scans.
Answer
C. Scanned Keyboard Mode
59
A RAM chip has a capacity of 1024 words of 8 bits each (1K Γ 8). The number of 2 Γ 4
decoders with enable line needed to construct a 16K Γ 16 RAM from 1K Γ 8 RAM is :
Answer
B. 5
60
The reason for performing Register Renaming in pipelined processors is :
Answer
D. It is done to eliminate output dependences and antidependences between
instructions
61
The performance of pipelined processor is badly affected if :
Answer
D. All of the above
62
In an instruction execution pipeline, the earliest that the data TLB (Translation Look a side
Buffer) can be accessed is :
Answer
C. after effective address calculation has completed
63
Increasing the RAM of a computer typically increases the performance because :
Answer
B. Fewer Page Faults occur
64
Consider a direct mapped cache of size 32 KB with block size 32 bytes. The CPU generates 32
bit addresses. The number of bits needed for cache indexing and the number of tag bits are
respectively, βββββ and βββββ.
Answer
A. 10, 17
65
Consider the following two resource allocation policies (to processes) :
P1: Make a process to release all resources before requesting a new resource.
P2: Make a process to request and get allocated all the required resources before execution.
Which of the policies will lead to deadlock prevention?
Answer
A. Both P1 and P2
66
In a uniprocessor system, three processes P1, P2, and P3 having overall execution time of 10,
20 and 30 units respectively, arrive at the zeroth instant. Each process spends the first 20%
of the overall execution time doing I/O operations, the next 70% of time doing computation,
and the last 10% of time doing I/O operations again. The operating system employs Shortest
Remaining Time First scheduling algorithm and schedules a new process either when the
running process gets blocked due to its I/O operations or when the running process finishes
its computing. Assume that all I/O operations of the processes can be overlapped. For what
percentage of the total time (from the zeroth instant till all processes finish) does the CPU
remain idle?
Answer
C. 10.64%
67
Which of the following scheduling algorithms is most suitable for a time-sharing operating
system?
Answer
D. Round Robin
68
A process executes the equivalent executable code: for (i = 0; i < n; i++) fork(); The number of child processes created which do not further create any child processes is:
Answer
Question Cancelled
69
The arrival time and processing time of four processes, in the pattern (Process name, Arrival
time, Processing time) are as follows: (P1, 0, 6), (P2, 2, 12), (P3, 8, 8), (P4, 12, 4). Which of the
following process scheduling algorithms will give the lowest average turnaround time?
Answer
C. Shortest Remaining Time First
70
Belady's anomaly may occur if βββββ page replacement policy is employed.
Answer
A. FIFO
71
There are three processes in a system. Each requires access to four units of a non-sharable
I/O device for their computation. What is the minimum number of instances of the I/O device
required so that the processes will never face a deadlock?
Answer
B. 10
72
Consider the following two statements regarding Magnetic Disks with concentric circular
tracks :
S1 : The highest share of Disk Service Time is contributed by rotational latency.
S2 : All tracks have the same storage capacity.
Which of the following is correct?
Answer
B. S1 is false and S2 is true
73
class Parent {
final public void fun1
Answer
C. and fun2
74
Which of the following statements is true in case of multiple catch blocks in JAVA?
Answer
C. The superclass exception cannot be caught first
75
Which of the following contains only unimplemented methods?
Answer
B. An Interface
76
Which is/are valid constructor(s) for Thread in JAVA?
1. Thread (Runnable r, String name)
2. Thread
3. Thread (int priority)
4. Thread (Runnable r, int priority)
Answer
D. land 2
77
Consider the following code snippet in JAVA :
String str1 = new String (βKeralaβ) ;
String str2 = new String (βKeralaβ) ;
String str3 = βKeralaβ ;
String str4 = βKeralaβ ;
How many objects are created?
Answer
C. 3
78
What is the time complexity of the algorithm to check whether an edge exists between a
given pair of nodes, if the graph is represented as an adjacency list?
Answer
A. O(V)
79
If the post order traversal of the above graph gives pq + rsβ β then the label of the nodes 1, 2,
3, 4, 5, 6, 7 will be :
Answer
A. β, +, β, p, q, r, s
80
A priority queue is implemented using a binary max heap. Which of the following is a valid
level order traversal of the heap and the content of the heap after two delete operations?
Answer
C. [35, 24, 26, 23, 20, 18, 22] & [24, 23, 22, 18, 20]
81
Local variables of a function are stored in :
Answer
B. Stack
82
Which is the correct DFS search sequence of the above graph if the search starts from node
5 and reverse lexicographic ordering of the adjacent vertices are chosen for search?
Answer
D. 5, 4, 3, 1, 2, 0
83
A software project involves execution of FIVE tasks T1 , T2 , T3 , T4 and T5 each of duration
8, 10, 13, 25 and 30 hours respectively. The tasks T2 and T4 can start only after T1 is
complete. Task T3 can start only after T2 is complete. Task T5 can start only after both T3
and T4 are complete :
Answer
Question Cancelled
84
What is the primary determinant of selecting activities in each iteration in the Spiral model
of software development?
Answer
A. Risk
85
In a software project COCOMO is used to estimate :
Answer
A. effort and duration based on the size of the software
86
The measure of the time between observed system failures is :
Answer
C. Mean Time to Failure (MTTF)
87
Which of the following statement are TRUE about an SQL query?
(i) An SQL query can contain a HAVING clause even if it does not have a GROUP BY
clause
(ii) An SQL query can contain a HAVING clause only if it has GROUP BY clause
(iii) All attributes used in the GROUP BY clause must appear in the SELECT clause
(iv) Not all attributes used in the GROUP BY clause need to appear in the SELECT clause
Answer
B. (i) and (iv)
88
Consider the schema R = (A, B, C, D) and dependencies A β B, B β C, C β D and D β A. Let R = (Rβ and Rβ) be a decomposition such that Rβ β© Rβ β β
. The decomposition is:
Answer
D. In both 2NF and 3NF
89
When a transaction Ti requests a data item currently held by T j ,Ti is allowed to wait only if
it has a timestamp larger than that of T j (that is Ti is younger than T j ). Otherwise, T j is
rolled back. The scheme is :
Answer
C. Wound-wait
90
Which of the following is the correct way to register a JdbcOdbcDriver?
Answer
A. jdbc.odbc.JdbcOdbcDriver obj = new sun.jdbc.odbc.JdbcOdbcDriver();
91
Given the basic ER and relational models, which of the following is correct?
Answer
D. In a row of a relational table, an attribute can have exactly one value or a NULL
value
92
If a join operation J1 preserves those tuples which might get lost in join operation J2 :
Answer
Question Cancelled
93
Which of the following file organizations helps in fast retrieval of data?
Answer
D. Hash
94
What is the correct syntax to write an HTML comment?
Answer
C.
95
Which of these tags is used for embedding CSS in an HTML page?