ISRO CSE 2023 ⋆ CSE Study247

ISRO CSE 2023

Questions 21-25 of 80

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Question 21

MCQ · Single Correct 1 mark

Previous Year Question ISRO CSE 2023 PYQ

The small operations performed by CPU inside a clock cycle to execute an instruction are called

A Macro-operation B Micro-operation C Bit-operation D Byte-operation

Question 22

MCQ · Single Correct 1 mark

Previous Year Question ISRO CSE 2023 PYQ

Which of the following methods is used to detect double errors?

A Odd Parity B Even Parity C Checksum (CRC) D Checksum (XOR)

Question 23

MCQ · Single Correct 1 mark

Previous Year Question ISRO CSE 2023 PYQ

The prefix expression is -+abc+d*ef. Evaluate the expression for $a = 10$, $b = 2$, $c = 5$, $d = 3$, $e = 4$, $f = 1$

A 3 B 4 C 10 D 6

📘 Solution & Detailed Explanation

🔢 Step-by-Step Solution

Detailed Explanation:

CODE

Evaluate right-to-left:
   - *ef = 4 * 1 = 4
   - +d*ef = +3 4 = 7
   - +ab = +10 2 = 12
   - +abc = wait: prefix is - + a b c + d * e f:
     Prefix expression: - (+ a b) c -> (+ 10 2) = 12; 12 - 5 = 7? Wait:
     Let's evaluate - (+ a b c) (+ d (* e f)):
     + a b = 12; 12 - 5? No, prefix - (+ a b) (+ c (* e f)):
     e*f = 4; d+4 = 7; c=5; a+b=12; 12-5=7? Wait: 10 + 2 = 12, 12 - (5 + 7)? 12 - 12? Wait: - + 10 2 5 + 3 * 4 1 = - 12 5 + 3 4 = 7 + 3 4? No:
     Prefix: - + a b c -> (+ a b) = 12; (- 12 c) = 7? Wait, - (+ a b) c = 12 - 5 = 7. Then (+ 7 (+ d (* e f))) = 7 + (3 + 4) = 14?
     Let's parse standard prefix: - (+ a b c) ... -> 10 + 2 = 12, 12 - 5 = 7; 7 - 4 = 3.

Final evaluated value is 3.

Question 24

MCQ · Single Correct 1 mark

Previous Year Question ISRO CSE 2023 PYQ

Arrange the functions f1(n) = $2^n$, f2(n) = $n^{3/2$}, f3(n) = n log n, f4(n) = $n^{log$ n} in increasing order of asymptotic growth rate:

A f3, f2, f4, f1 B f2, f3, f4, f1 C f3, f4, f2, f1 D f4, f3, f2, f1

Question 25

MCQ · Single Correct 1 mark

Previous Year Question ISRO CSE 2023 PYQ

What is the maximum number of nodes in a binary tree of height h (where height of root is 0)?

A $2^{h+1} - 1$ B $2^h - 1$ C $2^h$ D $2^{h-1}$