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61.

Consider a relational table with a single record for each registered student with the following attributes.
1. Registration_Num: Unique registration number of each registered student
2. UID: Unique identity number, unique at the national level for each citizen
3. BankAccount_Num: Unique account number at the bank. A student can have multiple
4. Name: Name of student
5. Hostel_Room: Room number of the hostel
Which of the following options is INCORRECT? [1 mark]
(A) BankAccount_Num is a candidate key
(B) Registration_Num can be a primary key
(C) UID is a candidate key if all students are from the same country
(D) If S is a superkey such that S∩UID is NULL then S∪UID is also a superkey

last reply by CpjJwWHV • 13 years ago • asked in Computer Science And Engineering, 2011

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62.

Given digits 2, 2, 3, 3,3, 4, 4, 4, 4 how many distinct 4 digit numbers greater than 3000 can be formed? [2 marks]
(A) 50
(B) 51
(C) 52
(D) 54

last reply by CpjJwWHV • 14 years ago • asked in Computer Science And Engineering, 2010

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63.

Modern warfare has changed from large scale clashes of armies to suppression of civilian populations. Chemical agents that do their work silently appear to be suited to such warfare; and regretfully, there exist people in military establishments who think that chemical agents are useful tools for their cause.
Which of the following statements best sums up the meaning of the above passage;
[2 marks]
(A) Modern warfare has resulted in civil strife.
(B) Chemical agents are useful in modern warfare.
(C) Use of chemical agents in warfare would be undesirable.
(D) People in military establishments like to use chemical agents in war.

last reply by CpjJwWHV • 14 years ago • asked in Computer Science And Engineering, 2010

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64.

5 skilled workers can build a wall in 20 days; 8 semi – skilled workers can build a wall in 25 days; 10 unskilled workers can build a wall in 30 days. If team has 2 skilled, 6 semi-skilled and 5 unskilled workers, how long will it take to build the wall?
[2 marks]
(A) 20 days
(B) 18 days
(C) 16 days
(D) 15 days

last reply by CpjJwWHV • 14 years ago • asked in Computer Science And Engineering, 2010

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65.

Hari (H), Gita (G), Irfan (I) and Saira (S) are siblings (i.e. brothers and sisters). All were born on 1^st January. The age difference between any two successive siblings (that is born one after another) is less than 3 years. Given the following facts:
i. Hari’s age + Gita’s age > Irfan’s age + Saira’s age
ii. The age difference between Gita and Saira is 1 year. However, Gita is not the oldest and Saira is not the youngest.
iii. There are no twins.
In what order were they born (oldest first)? [2 marks]
(A) HSIG
(B) SGHI
(C) IGSH
(D) IHSG

last reply by CpjJwWHV • 14 years ago • asked in Computer Science And Engineering, 2010

View Comments [1 Reply]
66.

If 137 +276 = 435 how must is 731 + 672? [2 mark]
(A) 534
(B) 1403
(C) 1623
(D) 1513

last reply by CpjJwWHV • 13 years ago • asked in Computer Science And Engineering, 2010

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