Skip to content
10th Level - Practice App Completely Free · 100K+ Users Install
Login

PSC HSST Computer Science Model Questions and Answers – Part 4

Updated 30 Apr 2018 1 comment

Practice Mode

Sit all 20 questions full screen, one at a time. Sign in and your score, your time and where you got to are kept — put it down here and finish it on your phone.

Sign in to practise
51
Graph having every pair of vertices connected is called:
Answer
B. Complete graph
52
The Eigen vectors of a real symmetric matrix corresponding to different Eigen values are:
Answer
A. Orthogonal matrix
53
The system of equations 4x+6y=8, 3x+2y=1, 7x+8y=9 has:
Answer
C. two solutions
54
The Eigen values of the square matrix are:
Answer
C. real
55
The Equations will have:
Answer
Question not complete.
56
Which is fastest?
Answer
C. ECL
57
Which is commutative but not associative?
Answer
B, D
Explanation: NAND and NOR operations are commutative, but not associative. (x↓y)↓z ≠ x↓(y↓z) (↓ = NOR operation) (x↑y)↑z ≠ x↑(y↑z) (↑ = NAND operation)
58
Which is Universal gate?
Answer
B. NOR
Explanation: A universal gate is one from which all other basic gates can be formed. NAND and NOR are Universal gates.
59
How many NAND gates are needed to perform X.Y?
Answer
Invalid Question
Explanation: If the question was the minimum NAND gates required to perform X.Y the answer will be C (2).
60
Which is non-volatile?
Answer
D. ROM
61
Which is the access method to take data from tape memory?
Answer
B. Sequential
62
The cycle time for a memory system is:
Answer
B. longer than access time
63
How many RAM chips are needed to generate the (256K X 1 bit)?
Answer
C. 32
64
T flip-flops are generally used for:
Answer
C. counter and frequency divider
65
Register used as working area in CPU is:
Answer
D. Accumulator
66
A microprocessor can be:
Answer
D. All of the above
67
Which is 16 bit microprocessor?
Answer
C. Intel 8086
68
“n” flip-flops will divide the frequency into a factor of:
Answer
C. 2 to the power of 'n'
69
8 2 4 1 is the:
Answer
8421 is BCD code.
Explanation: BCD Code is 8421 (not 8241). Excess-3 and gray code are non-weighted codes.
70
(1001000010011001) base 2; equivalent in base 16 is:
Answer
Correct answer is 9099
Explanation: An easy way to convert from binary to hexadecimal is to group binary digits into sets of four, starting with the least significant (rightmost) digits. Pad the most significant digits with zeros if necessary to complete a group of four. Here 1001000010011001 is grouped as 1001, 0000, 1001, 1001. Decimal equivalent of each group is 9 0 9 9. Hence 9099 base 16 is the answer.
71
Which is a programmable interval timer?
Answer
A. 8253
72
Negative number cannot be represented in:
Answer
D. None of the above forms
73
Which of the following interrupt is both level and edge sensitive?
Answer
C. TRAP
74
What is a BUFFER?
Answer
C. An Interphase between CPU and peripheral
75
By default any real number in C is represented as:
Answer
B. a double

Related reading

LGS Malayalam PSC Questions Part 1 PSC LDC General English Model Questions & Answers [Part 9] PSC HSST Jr Botany (SR for ST only) Model Questions and Answers Kerala PSC Laboratory Technician Model Questions & Answers Junior Clerk, Co-operative societies PSC Questions – PDF Download PSC HSST Junior Geography Model Questions and Answers

1 comment

Ask a doubt or share a tip.

  1. Dinu

    Virtual Memory logically in Main Memory & physically in Hard Disk....

Leave a comment

Your email address and number are never published. Required fields are marked

We will email you a code to confirm the address. Posting creates a PSCNET account if you do not have one.

By posting, you agree to our Privacy Policy.