System Analysis and Design

291. A data element in a data flow

  1. may be an integer number
  2. may be a real number
  3. may be binary
  4. may be imaginary
  1. (i),(ii),(iv)
  2. (iii),(iv),(ii)
  3. (i),(ii),(iii)
  4. (i) and (ii)
Correct answer: (C)
(i),(ii),(iii)

292. In interactive data input terminal commands are normally used to

  1. enter new data
  2. add/delete data
  3. select one out of many alternatives often by a mouse click
  4. detect errors in data input
Correct answer: (B)
add/delete data

293. Group classification codes are

  1. concise
  2. meaningful
  3. expandable
  4. comprehensive
  1. i and ii
  2. i, ii and iii
  3. ii, iii and iv
  4. i, ii and iv
Correct answer: (C)
ii, iii and iv

294. Modulus-11 check digit for the code 85672 is

  1. 0
  2. 1
  3. X
  4. 3
Correct answer: (C)
X

295. An appropriate range check for month field in a date is

  1. 12
  2. -12 to 12
  3. 1 to 12
  4. 0 to 12
Correct answer: (C)
1 to 12

296. Good system design prevents data entry errors by

  1. Designing good forms with plenty of space to write in block capitals>
  2. By giving clear instructions to a user on how to fill a form
  3. Reducing keystrokes of an operator
  4. Designing good keyboard
  1. i, ii, iii
  2. i, ii, iv
  3. i, ii
  4. iii and iv
Correct answer: (A)
i, ii, iii

297. Key fields are normally coded

  1. as they provide a unique identification
  2. as they are used for retrieving records
  3. as they facilitate cross referencing between applications which use the key
  4. as it is useful
  1. i and ii
  2. i and iv
  3. ii and iii
  4. i and iii
Correct answer: (D)
i and iii

298. Design of error detecting codes requires good

  1. knowledge of mathematics
  2. statistical mechanics
  3. statistics of errors normally committed during data entry
  4. Boolean algebra
Correct answer: (C)
statistics of errors normally committed during data entry

299. Sequence numbering of records is used to

  1. Identify each record uniquely
  2. Track a missing record in a batch of records
  3. Count number of records
  4. Sort the records
  1. i, ii
  2. i, ii, iii
  3. i, ii, iii, iv
  4. i and iv
Correct answer: (C)
i, ii, iii, iv

300. For modulus-11 check digit to detect a single transposition errors the

  1. weights should all be distinct
  2. weights may all be equal and > 0
  3. weights should be less than 8
  4. weights should all be > 0 and distinct
Correct answer: (D)
weights should all be > 0 and distinct
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