PREVIOUS YEAR SOLVED PAPERS - July 2016 Paper 3
- Option : C
- Explanation : According to given question w1 = – 3.9 and w2 = 1.1 and x1 = 1.3 and x2 = 2.2 weighted sum = w1 * x1 + w2 * x2 + . . . wn * xn i.e. -3.9 * 1.3 + 1.1 * 2.2 = -5.07 + 2.42 = -2.65 Now we will compare the weighted sum -2.65 to the threshold 0.3. -2.65 < 0.3
Then output will be zero.
So, option (C) is correct.
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67. What is the function of following UNIX command ? WC – l b&
- A
It runs the word count program to count the number of lines in its input, a, writing the result to b, as a foreground process.
- B
It runs the word count program to count the number of lines in its input, a, writing the result to b, but does it in the background.
- C
It counts the errors during the execution of a process, a, and puts the result in process b.
- D
It copies the ‘l’ numbers of lines of program from file, a, and stores in file b.
68. Which of the following statement is not correct with reference to cron daemon in UNIX O.S. ?
- A
The cron daemon is the standard tool for running commands on a pre-determined schedule.
- B
The cron daemon is the standard tool for running commands on a pre-determined schedule.
- C
Cron reads configuration files that contain list of command lines and the times at which they invoked.
- D
Crontab for individual users are not stored.
- Option : D
- Explanation :
- The cron daemon is the standard tool for running commands on a pre-determined schedule.Correct
- The cron starts when the system boots and runs as long as the system is up.Correct
- Cron reads configuration files that contain list of command lines and the times at which they invoked.Correct
- Crontab for individual users are not stored.Incorrect Crontab is stored for individual user.
So, option (D) is correct.
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- Option : C
- Explanation : In Unix:
- Files can be protected by assigning each one a 9-bit mode called rights bits.
- A mode of 641 (octal) means that the owner can read and write the file, other members of the owner’s group can read it, and users can execute only.
- A mode of 100 (octal) allows the owner to execute the file, but prohibits all other access.
Both statement are correct regarding to UNIX. So, option (C) is correct.
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70. Consider the statement, “Either – 2 ≤ x ≤ – 1 or 1 ≤ x ≤2”. The negation of this statement is
- Option : A
- Explanation : “Either – 2 ≤ x ≤ – 1 or 1 ≤ x ≤2”. i.e. Eiter x ≥ -2 or x ≤ -1 or 1 ≤ x or x ≤ 2” We have to find negation of above statement: Negation of x ≥ -2 is x < 2. Negation of x ≤ -1 is x > -1. Negation of 1 ≤ x is x < 1 Negation of x ≤ 2 is x > 2. i.e. x < – 2 or 2 < x or – 1 < x < 1. So, option (A) is correct.
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