Answer question 19, 20, 21 showing fully all the steps. Solution should be perfect(very correct), clear, brief and explicit enough!
Extracted text: Name", "NumberOfColumns" and "PrimaryKey" you are looking at A. User data B. Metadata C. A report 25. The network topology that supports strictly bi-directional links for each possible node is A. Rind B. Star C. Tree D. Mesh D. Indexes 20. The characteristics of well designed system are: (a) Practical (b) Effective (c) Secure (d) Reliable (e) Flexible (f) Economical 26. Match the following D (i) Is the lowest layer whose function is to tactivaterand maintalh the circult between DTE and DCE P Performs routing 1- ata A. a, b, c and d B. a, c, d, and e C. a, b, c, d and e D. a, b, c, d e and f 21. existing procedures and information flow. link layer .includes review of the 2- hysica A. Feasibility study B. Feasibility report C. System design D. System analysis 22.Read Only Memory (ROM) Is volatile ii. and I layer communication P (i)Detection and Tecovery from agerrors in the 3- resent ation transmitted data (iv)Provide for the syntax of data Hayer Is programmable etwörk board A. 1-(i), 2-(i), 3-(iv), 4-(ii) B. 1-(ii), 2-(i), 3-(iv), 4-(iii) C. 1-(iv), 2-(i), 3-(ii), 4-(iii) D. 1-(i), 2-(1), 3-(ii), 4-(iv) 27. In a board sense, a rail way track is an example of A. Simplex B. Duplex C. Half-duplex D. Full-duplex 28. In object oriented design of software, objects have A. Attribute and name only B. Name and operation only C. Attribute, name and operations D. Attribute and operations only Equivalent hexadecimal of (7657)s will be A. FAF B. FAF C. FFF D. FAA iv. loader A. i and iii B. i, ii and iv C. ii, iis and iv D. Tii and iv 23. If every non-key attribute lis functionally dependent on the primary key then the relation will be in A. First normal form B. Second normal form C, Third nomal form D Fourth normal form 24. Which of the following OSI reference model level is more closely related to the physical communication facilities? A. Application B. Session C Network D. Data link 29.