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Hassan
1.Which memory is necessary to refresh many times in one second?
A. Dynamic RAM
B. Static RAM
C. EPROM
D. Dynamic RAM
2.RAM of a computer is
A. External Memory
B. Internal Memory
C. Auxiliary
D. External Memory
3.Flash memory is Also Known as……………
A. Flash RAM
B. Flash ROM
C. Flash DROM
D. Flash RAM
4.Primary memory is used for storing…………….
A. Data only
B. Calculations only
C. Programs only
D. Data only
5.The size of primary memory of computer in between
A. 2KB & 8KB
B. 8KB & 64KB
C. 64KB & 256KB
D. 2KB & 8KB
6.Memory is a part of
A. Input device
B. Output device
C. Central processing Unit
D. Input device
7.Whic one is ROM storage device?
A. Floppy disk
B. USB Device
C. Hard Disk
D. Floppy disk
8. In how many categories memory/storage is classified?
A. 2
B. 3
C. 4
D. 2
9.When when power is switched off which memory loses its data?
A. Non-Volatile Memory
B. Volatile Memory
C. Both A and B
D. Non-Volatile Memory
10. Auxillary memory access time is generally ________ times that of the main
A. 10
B. 100
C. 1000
D. 10
11.Which of the following is correct example for Auxiliary Memory?
A. Magnetic disks
B. Tapes
C. Flash memory.
D. Magnetic disks
12. Which of the proposition is p^ (~ p v q) is
A. A tautulogy
B. A contradiction
C. Logically equivalent to p ^ q
D. A tautulogy
13. Which of the following is/are tautology?
A. a v b → b ^ c
B. a ^ b → b v c
C. a v b → (b → c)
D. a v b → b ^ c
14.Logical expression ( A^ B) → ( C' ^ A) → ( A ≡ 1) is
A. Contradiction
B. Valid
C. Well-formed formula
D. Contradiction
15.Identify the valid conclusion from the premises Pv Q, Q → R, P → M, ˥M
A. P ^ (R v R)
B. P ^ (P ^ R)
C. R ^ (P v Q)
D. P ^ (R v R)
16. Let a, b, c, d be propositions. Assume that the equivalence a ↔ (b v ˥b) and b ↔ c hold. Then truth value of the formula ( a ^ b) → ((a ^ c) v d) is always
A. True
B. False
C. Same as the truth value of a
D. True
17.Which of the following is a declarative statement?
A. It's right
B. He says
C. Two may not be an even integer
D. It's right
18. P → (Q → R) is equivalent to
A. (P ^ Q) → R
B. (P v Q) → R
C. (P v Q) → ˥R
D. (P ^ Q) → R
19. Which of the following are tautologies?
A. ((P v Q) ^ Q) ↔ Q
B. ((P v Q) ^ ˥P) → Q
C. ((P v Q) ^ P) → P
D. ((P v Q) ^ Q) ↔ Q
20. If F1, F2 and F3 are propositional formulae such that F1 ^ F2 → F3 and F1 ^ F2→F3 are both tautologies, then which of the following is TRUE?
A. If F1, F2 and F3 are propositional formulae such that F1 ^ F2 → F3 and F1 ^ F2→F3 are both tautologies, then which of the following is TRUE?
B. The conjuction F1 ^ F2 is not satisfiable
C. Neither is tautologies
D. If F1, F2 and F3 are propositional formulae such that F1 ^ F2 → F3 and F1 ^ F2→F3 are both tautologies, then which of the following is TRUE?
21.Consider two well-formed formulas in propositional logic F1 : P →˥P F2 : (P →˥P) v ( ˥P →) Which of the following statement is correct?
A. F1 is satisfiable, F2 is unsatisfiable
B. F1 is unsatisfiable, F2 is satisfiable
C. F1 is unsatisfiable, F2 is valid
D. F1 is satisfiable, F2 is unsatisfiable
22. What can we correctly say about proposition P1: P1 : (p v ˥q) ^ (q →r) v (r v p)
A. P1 is tautology
B. P1 is satisfiable
C. If p is true and q is false and r is false, the P1 is true
D. P1 is tautology
23.(P v Q) ^ (P → R )^ (Q →S) is equivalent to
A. S ^ R
B. S → R
C. S v R
D. S ^ R
24. The functionally complete set is
A. { ˥, ^, v }
B. {↓, ^ }
C. {↑}
D. { ˥, ^, v }
25. The functionally complete set is
A. { ˥, ^, v }
B. {↓, ^ }
C. {↑}
D. { ˥, ^, v }
26. (P v Q) ^ (P→R) ^ (Q → R) is equivalent to
A. p
B. Q
C. R
D. p
27. ˥(P → Q) is equivalent to
A. P ^ ˥Q
B. P ^ Q
C. ˥P v Q
D. P ^ ˥Q
28.In propositional logic , which of the following is equivalent to p → q?
A. ~p → q
B. ~p v q
C. ~p v~ q
D. ~p → q
29.Which of the following is FALSE? Read ^ as And, v as OR, ~as NOT, →as one way implication and ↔ as two way implication?
A. ((x → y)^ x) →y
B. ((~x →y)^ ( ~x ^ ~y))→y
C. (x → ( x v y))
D. ((x → y)^ x) →y
30. Which of the following well-formed formula(s) are valid?
A. ((P → Q)^(Q → R))→ (P → R)
B. (P → Q) →(˥P → ˥Q)
C. (P v (˥P v ˥Q)) →P
D. ((P → Q)^(Q → R))→ (P → R)
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